The Archimedes screw, an ancient Greek invention for lifting water. Learn about its origins, how it works, and its modern ...

It was named after the Greek water clock because, prior to a 1959 earthquake, it erupted every three minutes. This kind of clock has been around for many years and in many ancient cultures.

India’s ancient water clock, was keeping time around 500 BCE using the flow of water. The West eventually got in on the action, with Ctesibius in ancient Greece refining the concept. But India ...